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GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging

Cadillac considering more engines, Vsport model for Escalade

Want to roll in the latest Cadillac Escalade? You can get it with a 6.2-liter V8... or a 6.2-liter V8. Cadillac only offers the one engine option. But that may soon change.
According to the latest from Automotive News, Cadillac is contemplating a couple of new powertrain options for its blingin' big ute. The report suggests a twin-turbo V6 and a V6 turbodiesel could be offered, and that Cadillac could create a Vsport version of the Escalade like it offers on the new CTS sedan.
The more diverse engine offerings would help attract buyers from the new Lincoln Navigator, its prime competitor, which switched from a 5.4-liter V8 this year to a 3.5-liter twin-turbo V6. The turbo V6 engines (both gasoline and diesel) would also help Cadillac market the Escalade overseas - particularly in Europe, where higher fuel prices preclude the prospect of driving a big V8 SUV for many buyers. Escalade sales have dropped from 35-40k units in the mid-2000s to around 12,000 the past couple of years.

Blackwings, a G 63 gets dirty and a wave of rad-era nostalgia | Autoblog Podcast #693

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Byron Hurd, who has spent the past few weeks sampling a near-endless string of enthusiast vehicles. They start off discussing Cadillac's 2022 CT4-V and CT5-V Blackwing models, which Byron had the opportunity to drive at Virginia International Raceway. They follow that up with a discussion of the Mercedes-Benz AMG G 63, which Byron also drove on a track, albeit one of a very different sort. After that, some news. Greg and Byron run down the list of returning enthusiasts nameplates, including Integra, Z and Countach, and cap off by talking about what a third-generation Acura NSX might look like.  Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #693 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving 2022 Cadillac CT5-V Blackwing First Drive 2022 Cadillac CT4-V Blackwing First Drive 2021 Mercedes-AMG G63 Off-Road Review News Mercedes shelves almost every V8 model for 2022 There will be a third-generation NSX, says Acura V.P. Lamborghini Countach LPI 800-4 revealed, basically a retro Sian 2023 Nissan Z is revealed with two turbos, 400 horsepower and six manual gears Acura Integra will return in 2022 after a long hiatus Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video: 2021 Mercedes-AMG G63 Off-Road Review -- The Forbidden Hoot | Autoblog